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发明名称
Piezoelectric oscillator
摘要
申请公布号
US2194676(A)
申请公布日期
1940.03.26
申请号
US19380196095
申请日期
1938.03.16
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
SCHNEIDER WILHELM
分类号
H03H9/05;H03H9/09
主分类号
H03H9/05
代理机构
代理人
主权项
地址
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